Lathe Cut Rings
Rothkopf is a leading rubber component company with over five decades of commitment to delivering superior quality products and outstanding customer service. For a standard-sized O-ring or a completely custom part, trust the team that delivers! Learn more about our lathe cuts below.
Lathe Cut Rings are instantly recognizable for their square (sometimes rectangular) cross-section profile. For that reason, they’re sometimes referred to as “Square” Rings or even “Washers.”
The difference between lathe cut rings and other square rings and washers is how they’re manufactured. Washers and square rings are typically molded or die-cut. The manufacturing process for lathe cut rings begins with melt-extruding the rubber compound into the form of a tube. The inside and outside diameters—and resulting wall thickness—are tightly controlled. Once cooled, the rubber tubes are pulled over a spinning mandrel, and then lathe cut to their finished dimensions.
Lathe cut rings perform as well or better than O-rings in static, higher pressure applications, and may offer some cost-savings depending on the material, size, and quantity. They are interchangeable with O-ring sizes on the AS568 Standard and fit in the same groove.
Lathe cut rings are available in most of the same compound materials as O-rings and other seals. Reach out to Rothkopf to see if a lathe cut ring is the right part in your application.
Superior quality parts, every time.
Our parts comply with industry and agency standards as indicated:
Buna N/Nitrite
Ethylene Propylene
Fluorocarbon
Fluorosilicone
Hydrogenated Nitrile
Neoprene
Silicone
Teflon
Polyurethane
GLT/GFLT
Custom Formulated
Our parts comply with industry and agency standards as indicated:
Mil-Aero/GPL
NSF
FDA
UL Listed
OEM specified approvals
Product finishing options include:
Teflon Coating (PTFE Resin)
Internal/External Lubrication
Color Coding
O-ring sizes we carry:
Standard
Metric
